Cummins 4BT Parts
Cummins 4BT 3.9L Diesel Engine Parts | Reliable Replacement Solutions
Cummins 4BT 3.9L diesel engine is widely used in industrial equipment, generators, agricultural machinery, construction machines, and commercial vehicles. Known for its durability, fuel efficiency, and simple mechanical design, the 4BT engine is one of the most reliable light-duty diesel engines ever built.
At 4BTdiesel, we supply high-quality replacement parts for Cummins 4BT, 4B, 4BTA, and 4BTAA engines, including engine rebuild kits, fuel system parts, turbochargers, cooling components, gaskets, and electrical parts.
All parts are supplied as OEM-standard replacement solutions designed for reliable fitment, stable performance, and long service life.
Send us your part number or engine serial number (ESN) for fast quotation.
Shop Cummins 4BT Parts by Category
- Fuel System Parts:Fuel injectors, injection pumps, fuel lift pumps, and related components ensure accurate fuel delivery and stable combustion. Worn fuel system parts may cause hard starting, smoke, power loss, or poor fuel efficiency.
- Turbocharger System:Turbochargers increase air intake and improve engine power output. We supply replacement turbochargers for Cummins 4BT, 4BTA, and 4BTAA engines to restore boost pressure and engine performance.
- Engine Internal Parts:Pistons, piston rings, cylinder liners, connecting rods, crankshafts, camshafts, and bearings are essential for engine rebuilding. These components restore compression and mechanical efficiency during overhaul.
- Cylinder Head & Gasket System:Cylinder heads, valves, rocker arms, and gasket kits maintain sealing performance between oil, coolant, and combustion chambers. Proper sealing prevents overheating, leakage, and compression loss.
- Lubrication System:Oil pumps, oil filters, and oil coolers ensure stable lubrication and protect internal engine components from wear, overheating, and contamination.
- Cooling System Parts:Water pumps, thermostats, radiators, and hoses help regulate engine temperature and prevent overheating under heavy load conditions.
- Electrical & Starting System:Starters, alternators, sensors, and switches ensure reliable engine starting and stable electrical performance.
- Seals & Gasket Kits:Complete gasket kits, O-rings, oil seals, and sealing components prevent leaks and ensure proper engine assembly during repair or rebuild.
Cummins 4B, 4BT, 4BTA Parts
| Product Description | Product Category | Manufacturer | Model | Product Subset | Part Number | Weight |
|---|---|---|---|---|---|---|
| CUMMINS 4B (3.9L) AFTERCOOLER PART: 3919805 | AFTERCOOLERS | CUMMINS | 4B (3.9L) | AFTERCOOLER | 3919805 | 1 |
| CUMMINS 4B BRG, MAIN SET STD 4B PART: C3802010 | BEARINGS | CUMMINS | 4B | BRG, MAIN SET STD 4B | C3802010 | 2 |
| CUMMINS 4B BRG, MAIN SET 0.75MM 4B PART: C3802013 | BEARINGS | CUMMINS | 4B | BRG, MAIN SET 0.75MM 4B | C3802013 | 2 |
| CUMMINS 4B BRG, MAIN SET 0.50MM 4B PART: C3802012 | BEARINGS | CUMMINS | 4B | BRG, MAIN SET 0.50MM 4B | C3802012 | 2 |
| CUMMINS 4B BRG, MAIN SET 0.25MM 4B PART: C3802011 | BEARINGS | CUMMINS | 4B | BRG, MAIN SET 0.25MM 4B | C3802011 | 2 |
| CUMMINS 4BT CAMSHAFT PART: 3925582 | CAMSHAFTS | CUMMINS | 4BT | CAMSHAFT | 3925582 | 12.6 |
| CUMMINS 4BT CAMSHAFT PART: 3929885 | CAMSHAFTS | CUMMINS | 4BT | CAMSHAFT | 3929885 | 27 |
| CUMMINS 4BTA CAMSHAFT PART: 3929734 | CAMSHAFTS | CUMMINS | 4BTA | CAMSHAFT | 3929734 | 12.6 |
| CUMMINS 4B 3.9 / 4BTA 3.9 / 4BT 3.9 CAMSHAFT, 4B (3914638) PART: C3925582 | CAMSHAFTS | CUMMINS | 4B 3.9 / 4BTA 3.9 / 4BT 3.9 | CAMSHAFT, 4B (3914638) | C3925582 | 12.8 |
| CUMMINS 4BT CRANKSHAFT - BARE PART: 3907803 | CRANKSHAFTS | CUMMINS | 4BT | CRANKSHAFT - BARE | 3907803 | 102 |
| CUMMINS 4BT CRANKSHAFT, 4B (3929036) PART: C3907803 | CRANKSHAFTS | CUMMINS | 4BT | CRANKSHAFT, 4B (3929036) | C3907803 | 102 |
| CUMMINS 4BT CYLINDER HEAD, W/ VALVES 4B PART: C3920005 | CYLINDER HEADS | CUMMINS | 4BT | CYLINDER HEAD, W/ VALVES 4B | C3920005 | 110 |
| CUMMINS 4B GASKET, HEAD 4B (3283569) PART: C3921393 | GASKET SETS (CYLINDER HEAD) | CUMMINS | 4B | GASKET, HEAD 4B (3283569) | C3921393 | 1.2 |
| CUMMINS GASKET SET - LOWER ENGINE 4B3.9 / QSB3.9-30 / QSB4.5-30 / B4.5C PART: 3802375 | GASKET SETS (LOWER ENGINE) | CUMMINS | 4B3.9 / QSB3.9-30 / QSB4.5-30 / B4.5C | GASKET SET - LOWER ENGINE | 3802375 | 2.88 |
| CUMMINS 4B GASKET, BOTTOM SET 4B PART: C3802375 | GASKET SETS (LOWER ENGINE) | CUMMINS | 4B | GASKET, BOTTOM SET 4B | C3802375 | 4 |
| CUMMINS 4B GASKET SET - OVERHAUL PART: MCB4B010H | GASKET SETS (MAJOR OVERHAUL) | CUMMINS | 4B | GASKET SET - OVERHAUL | MCB4B010H | 105 |
| CUMMINS 4B 3.9 GASKET SET - UPPER ENG - .25MM PART: 3802362 | GASKET SETS (UPPER ENGINE) | CUMMINS | 4B 3.9 | GASKET SET - UPPER ENG - .25MM | 3802362 | 2.31 |
| CUMMINS GASKET SET - UPPER ENGINE 4B 3.9 / QSB 3.9 / QSB 4.5 / B4.5C PART: 4089648 | GASKET SETS (UPPER ENGINE) | CUMMINS | 4B 3.9 / QSB 3.9 / QSB 4.5 / B4.5C | GASKET SET - UPPER ENGINE | 4089648 | 4.5 |
| CUMMINS 4B GASKET, TOP SET 4B PART: C3804896 | GASKET SETS (UPPER ENGINE) | CUMMINS | 4B | GASKET, TOP SET 4B | C3804896 | 4 |
| CUMMINS 4BT 3.9 GASKET, TOP SET 4B QSB PART: C4089648 | GASKET SETS (UPPER ENGINE) | CUMMINS | 4BT 3.9 | GASKET, TOP SET 4B QSB | C4089648 | 4 |
| CUMMINS 4B,6B KIT - PISTON PART: 3800756 | KITS (PISTON) | CUMMINS | 4B,6B | KIT - PISTON | 3800756 | 3.2 |
| CUMMINS 4ISB KIT - PISTON - 1.00MM PART: 4089421 | KITS (PISTON) | CUMMINS | 4ISB | KIT - PISTON - 1.00MM | 4089421 | 3.78 |
| CUMMINS 4ISB HPCR KIT - PISTON - .50MM PART: 4089420 | KITS (PISTON) | CUMMINS | 4ISB HPCR | KIT - PISTON - .50MM | 4089420 | 3.78 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802487 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802487 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802251 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802251 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802248 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802248 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802160 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802160 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802100 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802100 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON STD B SERIES PART: C3802060 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON STD B SERIES | C3802060 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 1.00MM B SERIES PART: C3802134 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 1.00MM B SERIES | C3802134 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 1.00MM B SERIES PART: C3802104 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 1.00MM B SERIES | C3802104 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 1.00MM B SERIES PART: C3802064 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 1.00MM B SERIES | C3802064 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 1.00 B SERIES PART: C3802253 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 1.00 B SERIES | C3802253 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 1.00 B SERIES PART: C3802250 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 1.00 B SERIES | C3802250 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 0.50MM B SERIES PART: C3802252 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 0.50MM B SERIES | C3802252 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 0.50MM B SERIES PART: C3802493 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 0.50MM B SERIES | C3802493 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 0.50MM B SERIES PART: C3802249 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 0.50MM B SERIES | C3802249 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 0.50MM B SERIES PART: C3802132 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 0.50MM B SERIES | C3802132 | 4.5 |
| CUMMINS 4B 3.9 / 6B 5.9 KIT, PISTON 0.50MM B SERIES PART: C3802102 | KITS (PISTON) | CUMMINS | 4B 3.9 / 6B 5.9 | KIT, PISTON 0.50MM B SERIES | C3802102 | 4.5 |
| CUMMINS 4B COOLER - OIL - 5-PLATE PART: 3921557 | OIL COOLERS | CUMMINS | 4B | COOLER - OIL - 5-PLATE | 3921557 | 5.7 |
| CUMMINS 4B COOLER, OIL 5 PLATE 4B PART: C3921557 | OIL COOLERS | CUMMINS | 4B | COOLER, OIL 5 PLATE 4B | C3921557 | 4.55 |
| CUMMINS 4BT PAN - OIL PART: 3901049 | OIL PANS | CUMMINS | 4BT | PAN - OIL | 3901049 | 10 |
| CUMMINS 4B PUMP, OIL 4B (3906413) PART: C3926202 | OIL PUMPS | CUMMINS | 4B | PUMP, OIL 4B (3906413) | C3926202 | 5 |
| CUMMINS 4BT PUMP, OIL 4.5 QSB PART: C4939586 | OIL PUMPS | CUMMINS | 4BT | PUMP, OIL 4.5 QSB | C4939586 | 5 |
| CUMMINS 4B,6B PISTON - ENGINE PART: 3935591 | PISTONS | CUMMINS | 4B,6B | PISTON - ENGINE | 3935591 | 2.7 |
| CUMMINS 4BT / 6BT PUMP, SEAWATER 4B3.9/6B5.9 PART: C3912019 | WATER PUMPS | CUMMINS | 4BT / 6BT | PUMP, SEAWATER 4B3.9/6B5.9 | C3912019 | 5 |
Popular Cummins 4BT Parts
- Cummins 4BT Overhaul Kit
- Cummins 4BT Rebuild Kit
- Cummins 4BT Fuel Injectors
- Cummins 4BT Injection Pump
- Cummins 4BT Turbocharger
- Cummins 4BT Water Pump
- Cummins 4BT Oil Pump
- Cummins 4BT Gasket Kit
- Cummins 4BT Cylinder Head
- Cummins 4BT Piston & Liner Kit
- Cummins 4BT Crankshaft
- Cummins 4BT Camshaft
- Cummins 4BT Connecting Rod
- Cummins 4BT Starter Motor
- Cummins 4BT Alternator
Benefits of Using Quality 4BT Engine Parts
- Extend engine service life
- Restore original engine performance
- Improve fuel efficiency
- Reduce downtime and repair cost
- Ensure stable operation under heavy load
- Prevent oil, fuel, and coolant leakage issues
The Cummins 4B 3.9L is known for its reliability, but like any engine, it requires regular upkeep to prevent common issues.
Why Choose 4BTdiesel for Cummins 4BT 3.9L Diesel Engine Parts?
- OEM-Standard Replacement Quality:Our parts are built to meet or exceed OEM specifications, helping ensure reliable fitment, stable performance, and long service life.
- Comprehensive Parts Supply:We offer a wide range of Cummins 4BT engine parts, including fuel injectors, injection pumps, turbochargers, pistons, liners, gasket kits, oil pumps, water pumps, cooling system components, and engine rebuild parts.
- Competitive Prices:We provide cost-effective replacement solutions to help repair shops, equipment owners, and distributors control maintenance costs without sacrificing quality.
- Fast Shipping Support:Reduce equipment downtime with fast quotation, flexible shipping options, and global delivery support.
- Expert Parts Matching:Our experienced team can help you select the correct Cummins 4BT part by part number, engine serial number, CPL number, engine nameplate photo, or old part photos.
- Pre-Shipment Verification:Photos and videos can be provided before shipment to help confirm part accuracy and give you additional confidence before delivery.
Order Your Cummins 4BT Parts Today
Keep your Cummins 4BT 3.9L diesel engine running efficiently with high-quality replacement parts from 4BTdiesel. Whether you need fuel injectors, turbochargers, gasket kits, oil pumps, water pumps, pistons, liners, or other critical engine components, we can help you find the right parts for your repair or rebuild project.
Ensure stable performance, reduce downtime, and extend the service life of your engine. Send us your part number, engine serial number, or product photos today for a fast quotation and availability check.
